XxGeinNothingxX

iTrader: (1)

I have been reading the stickies on this and got most of what I was looking for I believe but just wanna make sure. I got a chance on a really good deal for the engine, trans, comp, and wiring.

From what I been reading, this motor sill drop right in...trans and all. I just have a couple questions that I probably could have found but didn't look hard enough.

I was wondering, will my hedman headers be able to bolt right up perfectly? I read that I may have to buy some kind of converter box for the speedo becuase I believe the motor and trans is a 95, is this true? I know I will need to make the new fuel lines and whatnot. All old wiring must be torn out and all the new in right, for the new TPI intake and all?

Just wondering if there is anything else to know, and what the usual outcome of having the LT1 in a thirdgen. Will she run harder?

I was also thinking I would put that LT1 cam and kit in it before installing and getting the computer changed for that.

Let me know what you guys think and for the ones who have done it, how it went and how they like it.

Thanks.

five7kid

iTrader: (14)

I wouldn't say that just because of the wiring and PCM mounting.

And, the AC compressor hits the 3rd gen crossmember.

I think it's a decent swap. I went the other direction, though.

rdog30

your headers will work fine. Might have to add a second o2 sensor though. The motor and tranny will drop right in if you are running the ac delete pulley. If you plan on keeping the ac then you have to knotch the k-member to make it fit. Make sure you get the underhood fuse box with your wiring. It makes it easier with the relays. If your car has the electric gauges you should be able to just wire the speedo directly to the pcm. It's the same pulse rate. By lt1 kit you mean lt4 hot cam kit right?Bigger cams out there, but that is up to you. I went from a 305tpi to my LT1 from a 95 impala ss so, to me it was a big difference and well worth it.

XxGeinNothingxX

iTrader: (1)

Ya, I ment the LT4 kit. I would probaly run the AC delete kit, never used it anway. I believe I can pick this motor up real cheap and it only has about 50000 miles on it, so I was seeing what everyone though. Thanks for the info so far, I appreciate it.

Firebat

iTrader: (7)

Any SBC header that has at least 5/8" primaries will bolt up and I believe most hedmans are 1 5/8". Correct, you will need to weld in an O2 bung for the 2nd O2 sensor.

Thirdgen.org member z 2 8 r i c e r (no spaces) makes nice stainless steel fuel lines that go right in. Or you can use hose clamps and fuel line hose but not as safe. Or some have used the LT1 hard plastic lines, cut them, and heat shrunk them to the thirdgen hard fuel lines.

Power steering lines will be an issue. I used a PS line from a 95 caprice and bent it to fit. You can also buy SS lines for PS from z 2 8 r i c e r.

I wouldn't rip out the old wiring right away. First, figure out your LT1 harness and trim down the stuff you don't need for sure like the headlight wiring for example. Then splice wires together, make sure everything works, then trim down the wiring in your car.

Since your car is a 91-92 camaro it will have an electronic driven speedometer so no problems getting the speedo to work as long as everything is wired up right.

It is cheaper to have the heads ported and to get a cam by someone like Lloyd Elliot. Plus, it will make more power than the LT4 kit. However ported Lt4 heads will make power but aftermarket LT4 heads are better for porting. Trickflow is supposed to be coming out with 21 degree LTX heads(All current aftermarket and stock heads are 23 degrees) which are supposed to flow better while keeping the compression low. These 21 degree heads won't require custom headers.

Good sites to research the LTX world are LTXtech.com, LS1tech.com, CamaroZ28.com

BCdawg57

iTrader: (1)

I have the fuel lines by z28 r i c e r, they are very nice lines, and also, he made my power steering line, works very well also.

I have the hot cam kit in my lt1, i bought it because of the money, and i thought it would be enough cam for me. In hindsight i wish i would of gotten the cc503 or something like it. The best way to go in my opinion, while still not spending too much money, is Lloyd Elliot. I would have done that, but i was already stretched for money as it was. That will probably give me something to do during some winter in the future.

As far as PCM mounting, i think the easiest way to do it would to be to extend your wiring harness to your PCM and just mount it where your factory computer is. Works great for me. Makes for a neater install also.

As far as how is a thirdgen with an LT1 in it, well i went from a 305 5speed, and is has so much more power in the top end its ridiculous, while having mucho torque like the TPI's. I still think the tune is holding me back a bit too. I love it.

Jay87Z

iTrader: (2)

I have a set of LT1 swap fuel lines and power steering line made by z28r-icer. I don't need them anymore, let me know if you want them. I'll make you a good deal. THey're brand new.

ssean92

iTrader: (10)

I think there is alot of guys here that car help once you get it going, Just dont expect it to be a real quick swap. It will take sometime to get all the bugs out. It will be well worth the swap.

bmfIROC-Z

iTrader: (1)

pat's pacecar

i am swaping a lt1 in my 82 Z28 did u still have them lines and how much would u want for them Thanks alot Patrick

1bdbrd

iTrader: (1)

What about the headers? I know that the lt1 uses d port heads and have been told by a friend that I need the matching d port headers. I know many on here use standard port headers but he said he could NEVER get his 1 3/4 headers to seal until he put on the properly designed headers.

I refuse to run shorties and don't want to buy another set of long tubes for my car. I had some good plans for an lt1 but am worried about the exhaust.

J's T/A

iTrader: (2)

posted this quite a few times. Hedman 66469, long tube coated, d-port. You can see them at this thread https://www.thirdgen.org/forums/ltx-...lt1-about.html they fit the car very well. I did run edelbrock TES with the engine they didn't leak but really choked the power.

1bdbrd

iTrader: (1)

Problem is, those headers are still 1 5/8. The LT1 I would like to build is a pretty radical setup and those just aren't big enough. IMO they really aren't big enough for a stock engine either.

J's T/A

iTrader: (2)

what power do you want to make? What does radical mean? I am over 400rwhp and about as radical as you would want to get on a hydraulic roller for the street with an LTx. They don't give up as much power as you think.

Since you have dougs headers I would try them out first, as other folks have run 13/4 headers on LT heads with no trouble, if they don't work have the flange cut off yours and weld on a d-port flange.

It all depends on the sacrifices you want to make. I didn't want to give up another inch of ground clearance for 5-10rwhp.

1bdbrd

iTrader: (1)

On paper I was hoping to make around 440-450whp with an 11.9:1 355 with a big cam and ported heads and intake. Who knows if it would make that but its the ultimate goal.